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04-21-2010, 01:29 AM   #1
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Join Date: Jan 2010
Location: London
Posts: 6
50mm f1.4 FA aperture reading not showing


I've just bought a second-hand 50mm f1.4 which appears to be in very good condition. On my k-x it works just fine. However, on my K-7, it only intermittendly shows an aperture reading in the viewfinder/LCD etc.

There seems to be a little bit of "give" in the lens mount/aperture ring A setting, and moving the lens around while mounted does seem to help bring up the aperture reading.

All other lenses work fine on my k-7.

My question is: Does anyone have experience of this issue? And can I resolve it by, eg, tightening the mount screws or cleaning the lens contact points? Otherwise I will return it.

Thanks in advance.

04-21-2010, 01:43 AM   #2
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Join Date: May 2008
Location: Russia, Siberia, Novosibirsk
Posts: 323
Clean up contacts of the lens and the camera.
This happens when data or A contacts of lens are not in contact with a body.

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50mm, 50mm f1.4 fa, aperture, f1.4, k-7, k-mount, lens, pentax lens, slr lens
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